Remove hardcoded optimization level

--- a/makefile
+++ b/makefile
@@ -12,8 +12,9 @@
 CURSES_CFLAGS := $(shell ncursesw6-config --cflags) 
 CURSES_LIBS := $(shell ncursesw6-config --libs)
 
-
-CFLAGS += $(INCS) -Wall $(CURSES_CFLAGS) 
+LIBS += $(CURSES_LIBS)
+FLAGS := 
+CFLAGS += $(FLAGS) $(INCS) -Wall $(CURSES_CFLAGS) 
 
 # Files in library/ that need to be compiled
 SRC_LISP := library/bit.lsp \
@@ -29,19 +30,13 @@
 		library/plot.lsp \
 		library/unistd.lsp 
 
-CFLAGS += -O3
-
 ifeq ($(USE_FLTO),1)
-CFLAGS += -O3 -flto
+CFLAGS += -flto
 endif
 ifeq ($(USE_GDB),1)
 CFLAGS += -O0 -g
 endif 
 
-ifeq  ($(shell uname -n),raspberrypi)
-CFLAGS += -O3
-endif
-
 OBJ_LISP := $(SRC_LISP:.lsp=.o)
 
 ifeq  ($(shell uname -n),raspberrypi)